One method that meteorologists could use to find the height of a layer of clouds above the ground is to shine a bright spotlight
directly up onto the cloud layer and measure the angle of
elevation from a known distance away. Find the height of the
cloud layer in the diagram.

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.